5/16-24 x 1 1/8 Alloy Steel Socket Head Cap Screw is specified when a machine assembly needs a high-strength alloy steel socket screw with predictable head and drive geometry. For drawn-to-print replacement work, the 5/16-24 thread and 1 1/8 in. length help confirm the correct socket cap screw before installation. Applications often include fixture design, engineering departments, and power transmission, especially where counterbored or close-clearance mounting is required. Alloy steel supports strength-focused fastening where clamp load and repeatable assembly are important. This keeps the listing focused on the fastener geometry rather than broad catalog language. Technical Highlights Material: Alloy Steel Thread: 5/16-24 Length: 1 1/8 in. Nominal Body Diameter: .312 in. Head Diameter: 0.457 in. min / 0.469 in. max Head Height: 0.306 in. min / 0.312 in. max Hex Key Size: 1/4 Drive Type: Internal hex socket Call 773-775-7900 or email Sales@coldheaders.com for pricing, availability, or a quote.